package com.example.community.controller;

import com.example.community.annotation.LoginRequired;
import com.example.community.entity.*;
import com.example.community.event.EventProducer;
import com.example.community.service.*;
import com.example.community.util.CommunityConstant;
import com.example.community.util.CommunityUtil;
import com.example.community.util.HostHolder;
import com.example.community.util.RedisKeyUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.*;

@Controller
@RequestMapping("/discuss")
public class DiscussPostController implements CommunityConstant {

    @Autowired
    HostHolder hostHolder;

    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private UserService userService;

    @Autowired
    private CommentService commentService;

    @Autowired
    private LikeService likeService;

    @Autowired
    private EventProducer eventProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @RequestMapping(path = "/add",method = RequestMethod.POST)
    @ResponseBody
    public String addDiscussPost(String title,String content){
        User user = hostHolder.getUser();
        if (user == null){
            return CommunityUtil.getJSONString(403,"未登录！");
        }
        DiscussPost discussPost = new DiscussPost();
        discussPost.setUserId(user.getId());
        discussPost.setTitle(title);
        discussPost.setContent(content);
        discussPost.setCreateTime(new Date());
        discussPostService.addDiscussPost(discussPost);

        // 触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(user.getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(discussPost.getId());
        eventProducer.fireEvent(event);

        //计算帖子分数
        String redisKey = RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey,discussPost.getId());

        //报错到时候全局统一扑捉
        return CommunityUtil.getJSONString(0,"发布成功！");
    }

    @RequestMapping(path = "/detail/{discussPostId}", method = RequestMethod.GET)
    @LoginRequired
    public String getDiscussPost(@PathVariable("discussPostId")int discussPostId, Model model, Page page){
        //帖子
        DiscussPost post = discussPostService.findDiscussPostById(discussPostId);
        model.addAttribute("post",post);
        //作者
        User user = userService.findUserById(post.getUserId());
        model.addAttribute("user",user);
        //点赞
        long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST,discussPostId);
        model.addAttribute("likeCount",likeCount);
        //点赞状态
        int likeStatus = hostHolder.getUser() == null ? 0 :
                likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_POST,discussPostId);
        model.addAttribute("likeStatus", likeStatus);

        // 评论分页信息
        page.setLimit(5);
        page.setPath("/discuss/detail/" + discussPostId);
        page.setRows(post.getCommentCount());

        // 评论: 给帖子的评论
        // 回复: 给评论的评论
        // 评论列表
        List<Comment> commentList = commentService.findCommentsByEntity(
                ENTITY_TYPE_POST, post.getId(), page.getOffset(), page.getLimit());
        // 评论VO列表
        List<Map<String, Object>> commentVoList = new ArrayList<>();
        if (commentList != null) {
            for (Comment comment : commentList) {
                // 评论VO
                Map<String, Object> commentVo = new HashMap<>();
                // 评论
                commentVo.put("comment", comment);
                // 作者
                commentVo.put("user", userService.findUserById(comment.getUserId()));

                //点赞
                likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT,comment.getId());
                commentVo.put("likeCount",likeCount);

                //点赞状态
                likeStatus = hostHolder.getUser() == null ? 0 :
                        likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_COMMENT,comment.getId());
                commentVo.put("likeStatus", likeStatus);

                // 回复列表
                List<Comment> replyList = commentService.findCommentsByEntity(
                        ENTITY_TYPE_COMMENT, comment.getId(), 0, Integer.MAX_VALUE);
                // 回复VO列表
                List<Map<String, Object>> replyVoList = new ArrayList<>();
                if (replyList != null) {
                    for (Comment reply : replyList) {
                        Map<String, Object> replyVo = new HashMap<>();
                        // 回复
                        replyVo.put("reply", reply);
                        // 作者
                        replyVo.put("user", userService.findUserById(reply.getUserId()));
                        // 回复目标
                        User target = reply.getTargetId() == 0 ? null : userService.findUserById(reply.getTargetId());
                        replyVo.put("target", target);

                        //点赞
                        likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT,reply.getId());
                        replyVo.put("likeCount",likeCount);

                        //点赞状态
                        likeStatus = hostHolder.getUser() == null ? 0 :
                                likeService.findEntityLikeStatus(hostHolder.getUser().getId(),ENTITY_TYPE_COMMENT,reply.getId());
                        replyVo.put("likeStatus", likeStatus);

                        replyVoList.add(replyVo);
                    }
                }
                commentVo.put("replys", replyVoList);

                // 回复数量
                int replyCount = commentService.findCommentCount(ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("replyCount", replyCount);

                commentVoList.add(commentVo);
            }
        }

        model.addAttribute("comments", commentVoList);
        return "/site/discuss-detail";
    }

    // 置顶
    @RequestMapping(path = "/top", method = RequestMethod.POST)
    @ResponseBody
    public String setTop(int id) {
        discussPostService.updateType(id, 1);

        // 触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id)
                .setData("postId",id)
                .setEntityUserId(discussPostService.findDiscussPostById(id).getUserId());
        eventProducer.fireEvent(event);

        return CommunityUtil.getJSONString(0);
    }

    // 加精
    @RequestMapping(path = "/wonderful", method = RequestMethod.POST)
    @ResponseBody
    public String setWonderful(int id) {
        discussPostService.updateStatus(id, 1);

        // 触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id)
                .setData("postId",id)
                .setEntityUserId(discussPostService.findDiscussPostById(id).getUserId());

        eventProducer.fireEvent(event);

        //计算帖子分数
        String redisKey = RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey,id);

        return CommunityUtil.getJSONString(0);
    }

    // 删除
    @RequestMapping(path = "/delete", method = RequestMethod.POST)
    @ResponseBody
    public String setDelete(int id) {
        discussPostService.updateStatus(id, 2);

        // 触发删帖事件，并且通知作者，帖子被删除
        Event event = new Event()
                .setTopic(TOPIC_DELETE)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id)
                .setData("postId",id)
                .setEntityUserId(discussPostService.findDiscussPostById(id).getUserId());
                //通知作者
                //.setData("targetUserId",discussPostService.findDiscussPostById(id).getUserId());

        eventProducer.fireEvent(event);

        //对应的评论修改状态为不可见
        commentService.updateStatus(id,1);
        //

        return CommunityUtil.getJSONString(0);
    }

    //作者本人删除
    @RequestMapping(path = "/deleteByUser/{id}", method = RequestMethod.GET)
    //@ResponseBody
    public String setDeleteByUser(@PathVariable("id") int id) {
        discussPostService.updateStatus(id, 2);

        // 触发删帖事件，并且通知作者，帖子被删除
        Event event = new Event()
                .setTopic(TOPIC_DELETE)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id)
                .setData("postId",id)
                .setEntityUserId(discussPostService.findDiscussPostById(id).getUserId());
        //通知作者
        //.setData("targetUserId",discussPostService.findDiscussPostById(id).getUserId());

        eventProducer.fireEvent(event);

        //对应的评论修改状态为不可见
        commentService.updateStatus(id,1);
        //

        //return CommunityUtil.getJSONString(0);
        return "redirect:/user/mypost/" + hostHolder.getUser().getId();
    }
}
